Built with a durable brass body rated for 700 PSI maximum working pressure

but you should confirm chemical compatibility for specialized applications

the Watts 740-1 1/4-35 is strictly intended for hot water space heating boilers

failure to close the pressure switch

heat-only systems

Resideo R8182D1079 Controller R-410A Built with a durable brassThe Resideo R8182D1079 is a heavy duty combination Protectorelay and hydronic heating controller designed for intermittent ignition oil burner systems. As a veteran grade triple Aquastat relay, this unit integrates primary safety control with high limit and low limit circulator functions in a single vertical mount housing. It operates on 120Vac and features a 45 second safety switch timing to prevent fuel flooding during ignition failure. The high